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| 1 | Effect of red mud on the mobility of heavy metals in mining-contaminated soils显示文摘The mobility of Cu2+, Zn2+, Ni2+, and Cd2+ in soils treated with red mud was experimentally studied to explore the feasibility of remediation of smelter-contaminated soils. Red mud samples were collected with the Bayer process (BRM) and confederate process (CRM) in the Aluminous Plant of Guizhou Province. Two farmed soil samples were collected from the Niujiaotang mining area, Guizhou Province, Southwest China. One sample was weakly polluted by fly ash; and the other was polluted severely by waste water from the smelter. For evaluating the potential of remediation, the concentrations of free metal ions and the distributions of metals in the soil were determined. The concentrations of free metal ions were measured by using the Donnan Membrane Technique, and the contributions of soil sorbents to the heavy metals adsorptions were calculated with Equilibrium Calculation of Speciation and Transport (ECOSAT). BRM reduced the concentrations of free metal ions in two kinds of soils, while CRM only favored the decrease of the concentrations of free metal ions in seriously contaminated soils. The experimental data also showed a tendency that the concentrations of free metal ions decreased proportionally with the amount of added red mud, which resulted from the increasing adsorption of heavy metal ions in the form of metal ion hydroxides. | YI Li HONG Yetang WANG Duojun ZHU Yongxuan | 2010 | Chinese Journal Of Geochemistry2010，29，2： | 9 |
| 2 | Correlation of karst agricultural geo-environment with non-karst agricultural geo-environment with respect to nutritive elements in Guizhou显示文摘The karst area accounts for 61.9% of the total area in Guizhou Province, which gives rise to a fragile environment and backward economy. Comparative studies on the element contents of rock and soil and agriculture production in both carbonate area and non-carbonate area have been made to establish factors leading to low output and poor quality of agricultural products in the karst area. The result shows that there is an apparent lack of nutrient elements in carbonate rocks. The trace element contents of carbonate rocks are only 3532.27×10-6, but those of non-carbonate rocks are 10894.21×10-6. The available element contents in culti-vated soil delivered from carbonate rocks are merely 101.4×10-6, but those from non-carbonate rocks are 326.05×10-6. The available element contents and total element contents in cultivated soil delivered from non-carbonate rocks are 3 times higher than those from carbonate rocks. Besides, high-quality agricultural products such as rice, potato and tea are mainly produced in the non-carbonate area. It is indicated that the low output and quality of agricultural products are caused by the above-mentioned low trace element contents and poor agricultural environment. Therefore, a new method of mineral nutrients compensation has been put forward, which is very effective to raise the load-bearing capacity of agricultural environment, agricultural output and quality of agricultural products. | CHEN Rong BI Kun | 2011 | Chinese Journal Of Geochemistry2011，30，4： | 7 |
| 3 | 土壤和叶面铅污染对铅在水稻体内的分布和积累的影响显示文摘分别采用土壤添加和叶面喷施Pb(OAC)2.3H2O的方式,进行了黄棕壤盆栽水稻Pb污染试验。结果发现:当土壤添加的Pb量为2000mg/kg时,水稻地上部分干重与对照相比下降显著,产量无显著变化。叶面Pb污染对水稻地上部分干重和产量均无显著影响。无论是土壤Pb污染还是叶面Pb污染,随着外源Pb污染浓度的增高,水稻植株各部分Pb含量也相应增高,其大小顺序在土壤污染时依次是根>叶>茎>籽粒,叶面污染时是叶片>根>茎>籽粒;不管是土壤Pb污染还是叶面Pb污染,水稻叶片的Pb含量与籽粒Pb含量之间的相关性显著。通过计算得出了水稻籽粒Pb含量与外源Pb污染浓度之间的相关性拟合曲线,从而进一步计算得出黄棕壤总Pb含量毒性临界值是95.7mg/kg,叶面污染溶液Pb的毒性临界值在实验条件(喷施9次,每次200ml)下为46.2mg/L。 | 李晓明 殷云龙 黄玉洁 徐和宝 | 2009 | 土壤2009，41，4： | 6 |
| 4 | Detection and Prevention of Environmental Hormone显示文摘The sorts and detection methods of environmental hormone were analyzed firstly,and then the effects of environmental hormone on organisms and humanity were discussed. Finally the control measures of environmental hormone pollution,such as reducing the use of goods and pesticide and the study of new substitutes and degradation technology are advanced. | Qili Chen Ling Pan Yanhong Xv Xuan Fu Hongzhen Sun Hongyan Li Pingping Liu | 2013 | Meteorological and Environmental Research2013，4，12： | 1 |
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